自动提示的文本框(加Ajax异步交互)
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Ajax实现自动提示的文本框title>
<style>
-- body
{
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
padding: 0px;
margin: 5px;
}
form
{
padding: 0px;
margin: 0px;
}
input
{
/* 用户输入框的样式*/
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
border: 1px solid #000000;
width: 200px;
padding: 1px;
margin: 0px;
}
#popup
{
/* 提示框div块的样式*/
position: absolute;
width: 202px;
color: #004a7e;
font-size: 12px;
font-family: Arial, Helvetica, sans-serif;
left: 41px;
top: 25px;
}
#popup.show
{
/* 显示提示框的边框*/
border: 1px solid #004a7e;
}
#popup.hide
{
/* 隐藏提示框的边框*/
border: none;
}
/* 提示框的样式风格*/
ul
{
list-style: none;
margin: 0px;
padding: 0px;
}
li.mouseOver
{
background-color: #004a7e;
color: #FFFFFF;
}
li.mouseOut
{
background-color: #FFFFFF;
color: #004a7e;
}
-- >style>
<script language="javascript">
var oInputField; //考虑到很多函数中都要使用
var oPopDiv; //因此采用全局变量的形式
var oColorsUl;
var xmlHttp;
function createXMLHttpRequest(){
if(window.ActiveXObject)
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
else if(window.XMLHttpRequest)
xmlHttp = new XMLHttpRequest();
}
function initVars(){
//初始化变量
oInputField = document.forms["myForm1"].colors;
oPopDiv = document.getElementById("popup");
oColorsUl = document.getElementById("colors_ul");
}
function clearColors(){
//清除提示内容
for(var i=oColorsUl.childNodes.length-1;i>=0;i--)
oColorsUl.removeChild(oColorsUl.childNodes[i]);
oPopDiv.className = "hide";
}
function setColors(the_colors){
//显示提示框，传入的参数即为匹配出来的结果组成的数组
clearColors(); //每输入一个字母就先清除原先的提示，再继续
oPopDiv.className = "show";
var oLi;
for(var i=0;i
//将匹配的提示结果逐一显示给用户
oLi = document.createElement("li");
oColorsUl.appendChild(oLi);
oLi.appendChild(document.createTextNode(the_colors[i]));
oLi.onmouseover = function(){
this.className = "mouseOver"; //鼠标经过时高亮
}
oLi.onmouseout = function(){
this.className = "mouseOut"; //离开时恢复原样
}
oLi.onclick = function(){
//用户点击某个匹配项时，设置输入框为该项的值
oInputField.value = this.firstChild.nodeValue;
clearColors(); //同时清除提示框
}
}
}
function findColors(){
initVars(); //初始化变量
if(oInputField.value.length > 0){
createXMLHttpRequest(); //将用户输入发送给服务器
var sUrl = "9-10.aspx?sColor=" + oInputField.value + "×tamp=" + new Date().getTime();
xmlHttp.open("GET",sUrl,true);
xmlHttp.onreadystatechange = function(){
if(xmlHttp.readyState == 4 && xmlHttp.status == 200){
var aResult = new Array();
//返回的结果responseText，每个匹配项间用逗号分隔，然后用split转换为数组，传递给setColors函数
if(xmlHttp.responseText.length){
aResult = xmlHttp.responseText.split(",");
setColors(aResult); //显示服务器结果
}
else
clearColors();
}
}
xmlHttp.send(null);
}
else
clearColors(); //无输入时清除提示框（例如用户按del键）
}
script>
head>
<body>
<form method="post" name="myForm1">
Color:<input type="text" name="colors" id="colors" onkeyup="findColors();" />
form>
<div id="popup">
<ul id="colors_ul">
ul>
div>
body>
html>
服务器文件9-10.aspx，服务器端根据用户的输入进行判断，然后自动返回提示结果
<%@ Page Language="C#" ContentType="text/html" ResponseEncoding="gb2312" %>
<%@ Import Namespace="System.Data" %>
<%
Response.CacheControl = "no-cache";
Response.AddHeader("Pragma","no-cache");
//获得用户输入
string sInput = Request["sColor"].Trim();
if(sInput.Length == 0)
return;
string sResult = "";
string[] aColors = new string[]{"aliceblue","antiquewith","aquamarine","azure","beige","bisque","black","blanchedalmond","blue","blueviolet","brass","bronze","brown","burlywood","cadetblue","chartreuse","chocolate","copper","coral","cornfloewrblue","cornsilk","cyan","darkblue","darkcyan","darkgoldenrod","darkgray","darkgreen","darkhaki","darkmagenta","darkolivegreen","darkorchid","darkorenge","darkred","darksalmon","darkseagreen","darkslateblue","darkslategray","darkturquoise","darkviolet","deeppink","deepskyblue","dimgray","dodgerblue","feldspar","firebrick","floralwhite","forestgreen","fuchsia","gainsboro","gold","goldenrod","golenrod","gostwhite","gray","green","greenyellow","honeydew","hotpink","indianred","inen","ivory","khaki","lavender","lavenderblush","lawngreen","lemonchiffon","lightblue","lightcoral","lightcyan","lightgodenrod","lightgodenrodyellow","lightgray","lightgreen","lightpink","lightsalmon","lightseagreen","lightskyblue","lightslateblue","lightslategray","lightsteelblue","lightyellow","lime","limegreen","magenta","magenta","maroom","maroon","mediumaquamarine","mediumblue","mediumorchid","mediumpurpul","mediumseagreen","mediumslateblue","mediumspringgreen","mediumturquoise","mediumvioletred","midnightblue","mintcream","mistyrose","moccasin","navajowhite","navy","navyblue","oldlace","olivedrab","orange","orchid","orengered","palegodenrod","palegreen","paleturquoise","palevioletred","papayawhip","peachpuff","peru","pink","plum","powderblue","purple","quartz","red","rosybrown","royalblue","saddlebrown","salmon","sandybrown","scarlet","seagreen","seashell","sienna","silver","skyblue","slategray","snow","springgreen","steelblue","tan","thistle","tomato","turquoise","violet","violetred","wheat","whitesmoke","yellow","yellowgreen"};
//将匹配的结果组合成字符串，并用逗号分隔
for(int i=0;i
if(aColors[i].IndexOf(sInput) == 0)
sResult += aColors[i] + ",";
}
if(sResult.Length>0) //如果有匹配项
sResult = sResult.Substring(0,sResult.Length-1); //去掉最后的“,”号
Response.Write(sResult);
%>